How can you make an extra table at the bottom of your index (under the who's online table)? For affiliations or something.

I already made one by adding a html in the description section of a forum, in which I worked with the position: absolute and changed the left and top etc., but because everyone has a different computer screen it not always stands on the right spot for everyone. Also, when I toggle a category, the whole site moves as it were upwards, but the table remains standing on the same spot. So, I was wondering if you could make a table with a different way (maybe with the templates), one that fits in the index for everyone. Please help.